MQTT - config problems for one ESP sensor

Configuration
1

Hope someone can help me out with this problem I cannot solve during the past two days. I am new to MQTT.
I try to run a WiFi Sensor ESP8266 via MQTT. While the sensor was running fine before via Thingspeak in HA, I decided to setup the sensor for HA via MQTT.
I do not think the sensor is the problem, it has something to do that HA cannot connect with the MQTT broker.
I have a separate laptop with HA OS on IP 192.168.178.37
I setup a new user in HA with the name: mqtt-user
I added MQTT client to addons
I added the integration MQTT
The last one gives the error: Not Loaded
I have mqtt explorer installed on my desktop Windows computer and it connects, I think, but I am unsure what to do here.
In the file editor, under configuration, I added the following:

mqtt:
broker: 192.168.178.37 # Use the correct Mosquitto hostname if it’s running locally (spaces at the beginning are lost in editor)
port: 1883
username: mqtt-user
password: Mqtt5tgb

sensor:

  • platform: mqtt
    name: “Temperature Sensor”
    state_topic: “home/sensor/temperature”
    unit_of_measurement: “°C”
    value_template: “{{ value | float }}”
  • platform: mqtt
    name: “CO2 Sensor”
    state_topic: “home/sensor/co2”
    unit_of_measurement: “ppm”
    value_template: “{{ value | int }}”
    The LOG gave me the following:Logger: homeassistant.config
    Source: config.py:940
    First occurred: 16:03:32 (1 occurrences)
    Last logged: 16:03:32

Invalid config for ‘mqtt’ at configuration.yaml, line 1: ‘broker’ is an invalid option for ‘mqtt’, check: mqtt->0->broker, please check the docs at MQTT - Home Assistant

Setup failed for ‘mqtt’: Invalid config.

The mqtt platform for the sensor integration does not support platform setup. Please remove it from your config.

Thanks in advance,
James

2

Configuring MQTT through configuration.yaml is deprectaed since awhile.
Add the MQTT integration through the UI.

3

Thanks Koying, I removed all from Configuration and it looks already a lot better. No error messages in the integration mqtt. However, any sensor declaration gives a fault.
Do I need to declare any sensor in configuration?
When I add the following, he complians about using “platform”
mqtt:
sensor:

  • platform: mqtt
    name: “CO2 Sensor”
    state_topic: “home/sensors/co2”
    unit_of_measurement: “ppm”
    sensor:
  • platform: mqtt
    name: “Temperature Sensor”
    state_topic: “home/sensors/temperature”
    unit_of_measurement: “°C”
    MESSAGE
    It’s not possible to configure mqtt sensor by adding platform: mqtt to the sensor configuration. To resolve this: Remove platform: mqtt occurences from the sensor: configuration in your YAML configuration file.

I tried some other config syntax but these return other errors.

Maybe you have an example, so I can mod it to my applcation?
Thanks

4

Please read the current documentation first, before trying some outdated examples.

The MQTT sensor is also deprecated since awhile.

5

Alright, true… I thought I do a quick go with help of chatgpt. Better to start reading. The problem however that there aren’t much examples. Did not expect this kind of time investment. Anyway. Thanks.

Edit: It works now with the following in configurations.yaml

my:
script: !include scripts.yaml
automation: !include automations.yaml
scene: !include scenes.yaml
history:

mqtt:
sensor:
- name: My temperature
state_topic: “home/sensors/temperature”
unit_of_measurement: “C”
- name: My CO2 level
unit_of_measurement: “ppm”
state_topic: “home/sensors/co2”

Note with copy paste: Be sure you make a 2 space indent with “sensor”: and then also 2 spaces indent to “-”. state is directly under name.